You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
228 lines
6.1 KiB
228 lines
6.1 KiB
use std::borrow::Cow;
|
|
use std::error::Error;
|
|
use std::ffi::OsStr;
|
|
use std::fmt;
|
|
use std::io;
|
|
use std::path::Path;
|
|
use std::path::PathBuf;
|
|
use std::process::Output;
|
|
use std::thread::sleep;
|
|
use std::time::Duration;
|
|
|
|
use command_runner::{CommandRunner, SetuidCommandRunner};
|
|
use resources::Resource;
|
|
use symbols::file::File as FileSymbol;
|
|
use symbols::{Action, OwnedSymbolAction, Symbol, SymbolAction, SymbolRunner};
|
|
|
|
#[derive(Debug)]
|
|
pub enum UserServiceError<E: Error> {
|
|
ActivationFailed(io::Result<Output>),
|
|
ExecError(E),
|
|
GenericError,
|
|
}
|
|
|
|
impl From<io::Error> for UserServiceError<io::Error> {
|
|
fn from(err: io::Error) -> Self {
|
|
Self::ExecError(err)
|
|
}
|
|
}
|
|
|
|
impl<E: Error> Error for UserServiceError<E> {
|
|
fn description(&self) -> &str {
|
|
match self {
|
|
UserServiceError::ExecError(ref e) => e.description(),
|
|
UserServiceError::GenericError => "Generic error",
|
|
UserServiceError::ActivationFailed(_) => "Activation of service failed",
|
|
}
|
|
}
|
|
fn cause(&self) -> Option<&dyn Error> {
|
|
match self {
|
|
UserServiceError::ExecError(ref e) => Some(e),
|
|
_ => None,
|
|
}
|
|
}
|
|
}
|
|
|
|
impl<E: Error> fmt::Display for UserServiceError<E> {
|
|
fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
|
|
write!(f, "{}", self.description())?;
|
|
if let UserServiceError::ActivationFailed(Ok(ref log)) = self {
|
|
write!(f, ": {:?}", log)?;
|
|
};
|
|
Ok(())
|
|
}
|
|
}
|
|
|
|
pub struct UserService<'a, C: AsRef<str>, R: CommandRunner> {
|
|
socket_path: Cow<'a, Path>,
|
|
service_name: &'a str,
|
|
user_name: Cow<'a, str>,
|
|
command_runner: R,
|
|
config: FileSymbol<C, PathBuf>,
|
|
}
|
|
|
|
impl<'a, R: CommandRunner> UserService<'a, String, SetuidCommandRunner<'a, Cow<'a, str>, R>> {
|
|
pub fn new_nodejs(
|
|
home: Cow<'a, Path>,
|
|
user_name: Cow<'a, str>,
|
|
service_name: &'a str,
|
|
path: Cow<'a, Path>,
|
|
command_runner: &'a R,
|
|
socket_path: Cow<'a, Path>,
|
|
) -> Self {
|
|
let content = format!(
|
|
"[Service]
|
|
Environment=NODE_ENV=production
|
|
Environment=PORT={1}
|
|
ExecStartPre=/bin/rm -f {1}
|
|
ExecStart=/usr/bin/nodejs {0}
|
|
ExecStartPost=/bin/sh -c 'sleep 1 && chmod 666 {1}'
|
|
|
|
# FIXME: This only works if the nodejs path is a directory
|
|
WorkingDirectory={0}
|
|
#RuntimeDirectory=service
|
|
#RuntimeDirectoryMode=766
|
|
Restart=always
|
|
|
|
[Install]
|
|
WantedBy=default.target
|
|
",
|
|
path.to_str().unwrap(),
|
|
socket_path.to_str().unwrap()
|
|
);
|
|
UserService::new(
|
|
socket_path,
|
|
home,
|
|
user_name,
|
|
service_name,
|
|
command_runner,
|
|
content,
|
|
)
|
|
}
|
|
|
|
pub fn new(
|
|
socket_path: Cow<'a, Path>,
|
|
home: Cow<'a, Path>,
|
|
user_name: Cow<'a, str>,
|
|
service_name: &'a str,
|
|
command_runner: &'a R,
|
|
content: String,
|
|
) -> Self {
|
|
let config_path: PathBuf = [
|
|
home.as_ref(),
|
|
format!(".config/systemd/user/{}.service", service_name).as_ref(),
|
|
]
|
|
.iter()
|
|
.collect();
|
|
|
|
UserService {
|
|
socket_path,
|
|
service_name,
|
|
user_name: user_name.clone(),
|
|
command_runner: SetuidCommandRunner::new(user_name, command_runner),
|
|
config: FileSymbol::new(config_path, content),
|
|
}
|
|
}
|
|
}
|
|
|
|
impl<'a, C: AsRef<str>, R: CommandRunner> UserService<'a, C, R> {
|
|
fn systemctl_wait_for_dbus(&self, args: &[&OsStr]) -> Result<String, Box<dyn Error>> {
|
|
let mut tries = 5;
|
|
loop {
|
|
let result = self.command_runner.run_with_args("systemctl", args)?;
|
|
if !result.status.success() {
|
|
let raw_stderr = String::from_utf8(result.stderr)?;
|
|
let stderr = raw_stderr.trim_end();
|
|
if stderr != "Failed to connect to bus: No such file or directory" {
|
|
return Err(stderr.into());
|
|
}
|
|
} else {
|
|
return Ok(String::from_utf8(result.stdout)?.trim_end().to_string());
|
|
}
|
|
tries -= 1;
|
|
if tries == 0 {
|
|
return Err("Gave up waiting for dbus to appear".to_string().into());
|
|
}
|
|
sleep(Duration::from_millis(500));
|
|
}
|
|
}
|
|
|
|
fn check_if_service(&self) -> Result<bool, Box<dyn Error>> {
|
|
loop {
|
|
let active_state = self.systemctl_wait_for_dbus(args![
|
|
"--user",
|
|
"show",
|
|
"--property",
|
|
"ActiveState",
|
|
self.service_name,
|
|
])?;
|
|
match active_state.as_ref() {
|
|
"ActiveState=activating" => sleep(Duration::from_millis(500)),
|
|
"ActiveState=active" => return Ok(true),
|
|
"ActiveState=failed" => {
|
|
return Err(Box::new(
|
|
UserServiceError::ActivationFailed(self.command_runner.run_with_args(
|
|
"journalctl",
|
|
args!["--user", format!("--user-unit={}", self.service_name)],
|
|
)) as UserServiceError<io::Error>,
|
|
))
|
|
}
|
|
_ => return Ok(false),
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
impl<'a, C: AsRef<str>, R: CommandRunner> Symbol for UserService<'a, C, R> {
|
|
fn target_reached(&self) -> Result<bool, Box<dyn Error>> {
|
|
if !(self.config.target_reached()?) {
|
|
return Ok(false);
|
|
}
|
|
self.check_if_service()
|
|
}
|
|
|
|
fn execute(&self) -> Result<(), Box<dyn Error>> {
|
|
self.config.execute()?;
|
|
self.systemctl_wait_for_dbus(args!["--user", "enable", self.service_name])?;
|
|
self.systemctl_wait_for_dbus(args!["--user", "restart", self.service_name])?;
|
|
|
|
loop {
|
|
if !(self.check_if_service()?) {
|
|
return Err(Box::new(
|
|
UserServiceError::GenericError as UserServiceError<io::Error>,
|
|
));
|
|
}
|
|
|
|
if self.socket_path.exists() {
|
|
return Ok(());
|
|
}
|
|
sleep(Duration::from_millis(500));
|
|
}
|
|
}
|
|
|
|
fn get_prerequisites(&self) -> Vec<Resource> {
|
|
let mut r = vec![Resource::new(
|
|
"file",
|
|
format!("/var/lib/systemd/linger/{}", self.user_name),
|
|
)];
|
|
r.extend(self.config.get_prerequisites().into_iter());
|
|
r
|
|
}
|
|
|
|
fn as_action<'b>(&'b self, runner: &'b dyn SymbolRunner) -> Box<dyn Action + 'b> {
|
|
Box::new(SymbolAction::new(runner, self))
|
|
}
|
|
|
|
fn into_action<'b>(self: Box<Self>, runner: &'b dyn SymbolRunner) -> Box<dyn Action + 'b>
|
|
where
|
|
Self: 'b,
|
|
{
|
|
Box::new(OwnedSymbolAction::new(runner, *self))
|
|
}
|
|
}
|
|
|
|
impl<'a, C: AsRef<str>, R: CommandRunner> fmt::Display for UserService<'a, C, R> {
|
|
fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
|
|
write!(f, "Systemd user service unit for {}", self.service_name)
|
|
}
|
|
}
|